release: v0.2.4 里程碑快照(孤儿提交,无父;树 = dev 68362e5)
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本批内容见 CHANGELOG.md 的 0.2.4 段。按 D41 用孤儿快照推 main,保留「公开史只有里程碑」的模型。
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//! 启动期取证:后端选项的换算 + 首帧耗时那一行日志。
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//!
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//! 从 `app/state.rs` 拆出(rebase 到 5adac23 之后 `state.rs` 顶到 401 行)。这两件事都属于
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//! 「进程启动那一刻记了什么」,与 `App` 的状态机无关;`state.rs` 只留 `pub(super) use` 再导出,
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//! 于是 `app/boot.rs`(`use super::state::STARTED`)与 `app/view.rs`(`log_first_frame`)的既有路径一字未变。
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use crate::app::diag::diag;
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::sync::OnceLock;
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use std::time::Instant;
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use crate::cli::Options;
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use unlucky_presenter::backend::AppOptions;
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/// 进程内「run() 开始」的时刻(首帧耗时基线)。
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pub(crate) static STARTED: OnceLock<Instant> = OnceLock::new();
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/// 首帧日志只打一次。
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static FIRST_FRAME_LOGGED: AtomicBool = AtomicBool::new(false);
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/// 启动参数 → presenter 的后端选项。
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pub(super) fn app_options(options: &Options) -> AppOptions {
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AppOptions {
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// `--data-dir`:M90 起**真的消费**它(此前是「接受并忽略」的翻牌兼容参数)。
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// 截图通道强制 mock,所以 CI 冒烟那条 `--data-dir <tmp>` 不会往那个目录写东西。
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data_root: options.data_dir.clone(),
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mock: options.screenshot.is_some() && !real_host_in_screenshot(),
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}
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}
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/// 取证开关 `ULL_SCREENSHOT_REAL_HOST=1`:让**截图通道**接真 host(默认关)。
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///
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/// ## 为什么需要它(M201)
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///
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/// 截图通道恒 `mock: true`(D30:同一份代码出同一张图),而 `MockBackend` **不发**
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/// `CoreEvent::SettingsChanged` ⇒ 设置页拿不到任何真值,只能拍演示行。可「设置页里改了就生效」
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/// 这件事的正脸图**必须带真值**:M193 用户的投诉就是「图上有 8 threads,追下去是假的」。
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/// 这条开关把出图的**数据源**换成真 host(`--data-dir` 指一个临时根),渲染通道与落盘一字不改。
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///
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/// ## 边界(别把它当产品行为)
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///
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/// - 默认关;开了它就不再满足 D30 的可复现(数据来自磁盘,两台机器会不同),所以**只用于取证**;
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/// - 它只改 `mock` 这一位,不碰任何业务分支(`build_backend` 的其余两条路仍然照旧);
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/// - 与 `ULL_START_ROUTE` / `ULL_SETTINGS_GROUP` 同一族:只影响这一次进程。
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fn real_host_in_screenshot() -> bool {
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std::env::var("ULL_SCREENSHOT_REAL_HOST")
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.ok()
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.is_some_and(|raw| raw.trim() == "1")
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}
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/// 首帧耗时日志(只在第一次 `view()` 打一行)。
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pub(crate) fn log_first_frame() {
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if FIRST_FRAME_LOGGED.swap(true, Ordering::Relaxed) {
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return;
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}
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if let Some(started) = STARTED.get() {
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diag!(
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"[boot] first frame in {:.0} ms(run() 开始 → 首次 view,含后端探测与字体扫描)",
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started.elapsed().as_secs_f64() * 1000.0
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);
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}
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}
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